Can you spot the problem with transmission lines...?
http://www.rwgiangiulio.com/math/pipelength.htm
The advantage is managing the phase from the back wave to reinforce or null at specific frequencies.
Traditionally, a transmission line is tapered and "stuffed" which absorbs some energy, lowers Q, and reduces bass extension. Been playing around with another idea that takes advantage of the difference between slow air movement and fast sound travel but, as yet, untested. Expect complications.
http://www.rwgiangiulio.com/math/pipelength.htm
The advantage is managing the phase from the back wave to reinforce or null at specific frequencies.
Traditionally, a transmission line is tapered and "stuffed" which absorbs some energy, lowers Q, and reduces bass extension. Been playing around with another idea that takes advantage of the difference between slow air movement and fast sound travel but, as yet, untested. Expect complications.